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    Question

    A number is first increased by 20% and then decreased by

    10%. If the final number is 108, find the original number.
    A 100 Correct Answer Incorrect Answer
    B 180 Correct Answer Incorrect Answer
    C 120 Correct Answer Incorrect Answer
    D 145 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    ATQ, Let the original number be x. After 20% increase = 1.2x After 10% decrease = 1.2x × 0.9 = 1.08x 1.08x = 108 x = 100

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